I V CONTENTS 



] liVixG IIardesty. a model to illustrate the probable action of the tectorial 



membrane. Seven figures 471 



H. M. Wahl. Development of the blood vessels of the mammary gland in 



the rabbit . Six figures 515 



Oharles R. Stockapd. a study of wandering mesenchymal cells on the 

 living yolk-sac and their developmental products: chromatophores, vas- 

 cular endothelium and blood cells. Thirty-five text-figures 525 



